Question

If sin 2 theta = cos 3, then theta is equal to ( theta<= 90°)

Answer 1

\[\sin 2 \theta=2 \sin \theta \cos \theta\]

Answer 2

2 sin theta cos theta=cos 3

Answer 3

@ganeshie8

Answer 4

do u have options ?

Answer 5

from the graph, there are two solutions. not sure how to find them analytically

Answer 6

http://www.wolframalpha.com/input/?i=solve+sin2%5Ctheta%3Dcosd%283%29%2C+0%3C%3D%5Ctheta%3C%3Dpi%2F2

Answer 7

18,30 i think

Answer 8

18,36,18 or 90

Answer 9

wait cos 3 ?

or cos 3 theta ?

Answer 10

3 degree or rad ?

Answer 11

anyway ,

theta = sin^-1 (cos 3 )/2

Answer 12

your not allowed to use calculator ?

Answer 13

cos 3

Answer 14

:O
and no calculator ?

Answer 15

just check options if u have ;)

Answer 16

theta = sin^-1 (cos 3 )/2 how to get the answer for sin^-1